Fastening device for an antenna



FIG. 1 is a top perspective view of a fastening device for an antenna according to an embodiment of the present invention;

FIG. 2 is a bottom perspective view thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a bottom view thereof;

FIG. 5 is a side view thereof, the opposite side being a mirror image;

FIG. 6 is a front view thereof; and,

FIG. 7 is a rear view thereof. 

CLAIM The ornamental design for a fastening device for an antenna, as shown and described. 